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A man took loan from a bank at the rate of 12% p.a. S.I. After 3 years he had to pay Rs. 5400 interest only for the period. The principal amount borrowed by him was?

  • A.Rs. 2000
  • B.Rs. 10000
  • C.Rs. 15000
  • D.Rs. 20000

Answer: C

\[ \text{SI} = \frac{P \times R \times T}{100} \]

\[ 5400 = \frac{P \times 12 \times 3}{100} = 0.36P \]

\[ P = \frac{5400}{0.36} = \text{Rs. } 15{,}000 \]

Three years at 12% comes to 36% of the principal, so the principal is a little under three times the interest.

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